GEKKO

In study arm A, potential participants receive an information folder about the GEKKO study when they visit their gastroenterologist. The folder includes additional information about the study, for example, a flyer in German and other relevant participant information. In addition, it contains a short questionnaire on health behavior and lifestyle. Completing the questionnaire takes about 15 minutes.

We ask our participants to make an appointment with the NCT Heidelberg by phone before making the appointment for the colonoscopy with the physician. During their visit to the NCT Heidelberg, they receive detailed information about the study. After confirming their participation in the study and signing the informed consent form, we ask them to provide one sample each of blood, saliva, urine, and stool. As an expense allowance, participants will receive a prevention bag with practical suggestions and current recommendations for a healthy lifestyle, as well as the latest information on cancer prevention, especially colorectal cancer prevention. A voucher for the cafeteria at the NCT Heidelberg and parking reimbursement are also included.

In study arm B, patients with indications of gastrointestinal, breast, and lung cancer are informed directly about the study through the corresponding clinics and recruited by members of the GEKKO study team. If the patient agrees, he or she will be asked once more for one blood, saliva, stool, and urine sample each.

Don't hesitate to get in touch with our study center, if you have any questions about the process. You will find our contact details further down in the text.

Various practices and clinics in the Heidelberg, Ludwigshafen, Sinsheim and Bruchsal area are cooperating with us in the GEKKO study. Informing and admitting the participants for the study takes place in the GEKKO study centers at the NCT or DKFZ and also in the practices and clinics of our cooperation partners.

Cooperating Institutions, Outpatient Clinics, and Hospitals:

Outpatient practices where the GEKKO team is recruiting on site:

• Dr. med. Johann-Thomas Schmidt
  Dr. med. Thorsten Schlenker
  Specialists in internal medicine and gastroenterology
  Praxis am Park
  Kurfürstenanlage 34
  69115 Heidelberg
  Phone: +49 6221 - 65 11 77
  Fax: +49 6221 - 65 11 799
  E-mail: info@praxis-schmidt-schlenker.de
  www.praxis-schmidt-schlenker.de
• Specialists for Internal Medicine
  Dr. med. Joachim Siedl
  Dr. med. Wolfgang Willareth
  Partnerschaftsgesellschaft (partnership company)
  Alte Waibstadter Staße 2c
  74889 Sinsheim
  Phone:  +49 7261 - 949 87 80
  Fax: +49 7261 - 949 87 87
  E-Mail: info@siedl-willareth.de
  www.siedl-willareth.de

Clinics recruiting for GEKKO:

• Fürst-Stirum-Clinic Bruchsal
  Study Department Intestinal Center
  Prof. Dr. med. Tom M. Ganten
  Ms. Jeanette Fehrer
  Gutleutstraße 1-14
  76646 Bruchsal
  Phone: +49 7251 - 70 80
• Clinical Center of the City of Ludwigshafen
  Medical Clinics A and C
  Bremserstrasse 79
  67063 Ludwigshafen

Outpatient practices and clinics assigning patients to us:

• Gynecologic Oncology
  National Center for Tumor Diseases (NCT) Heidelberg
  Prof. Dr. med. Andreas Schneeweiss
  Im Neuenheimer Feld 460
  69120 Heidelberg
• Interdisciplinary Endoscopy Center (IEZ) Heidelberg
  Prof. Dr. med. Peter Sauer / Prof. Dr. med. Anja Schaible, MBA
  www.iez-heidelberg.de
  Im Neuenheimer Feld 410
  69120 Heidelberg
• Dr. med. Fadi Chahoud
  Specialist in internal medicine
  Gastroenterology
  Health Center Bethanien at Agaplesion Bethanien Hospital
  Görresstrasse 22
  69126 Heidelberg
  Phone +49 6221 / 338370
  Fax +49 6221 / 338378
• Gastroenterology
  Dr. med. Martin Fischer
  Hauptstr. 119
  76669 Bad Schönborn
  Phone +49 7253 / 21806
  Fax +49 7253 / 27454

Former cooperating outpatient clinics and hospitals: who took part in the GEKKO study:

• Dr. med. Lars Helmstädter, Gastroenterologie im Mathematikon, Heidelberg
• Prof. Dr. med. Robert Ehehalt, Praxis für Gastroenterologie Heidelberg
• Gemeinschaftspraxis Dr. med. Isabelle Neureither and Dr. med. Sabine Schumacher, Heidelberg
• Praxis Drs. med. Hecker & Thome, ATOS Klinik Heidelberg
• Praxis Prof. Dr. med. Birgit Kallinowski, Gastroenterologie Schwetzingen
• Internistische Facharztpraxis Drs. med. Gernot Gast and Peter Wagner, Weinheim
• Schwerpunktpraxis für Gastroenterologie Dr. med. Jürgen Weers, Mannheim
• Schwerpunktpraxis Dr. med. Norbert Bruhn, Gastroenterologie / Hämatologie & Onkologie, Karlsruhe
• Gastroenterologie und Innere Medizin I, PD Dr. med. Uwe Seitz, Kreiskrankenhaus Bergstraße, Heppenheim
• Robert-Bosch-Krankenhaus, Klinik Schillerhöhe, Gerlingen
• Thoraxklinik, Universitätsklinikum Heidelberg